Annotation of src/usr.bin/chpass/field.c, Revision 1.13
1.13 ! deraadt 1: /* $OpenBSD: field.c,v 1.12 2009/10/27 23:59:36 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: field.c,v 1.3 1995/03/26 04:55:28 glass Exp $ */
3:
4: /*
5: * Copyright (c) 1988, 1993, 1994
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.5 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/param.h>
34:
35: #include <ctype.h>
36: #include <err.h>
37: #include <errno.h>
38: #include <grp.h>
1.6 avsm 39: #include <paths.h>
1.1 deraadt 40: #include <pwd.h>
41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <string.h>
44: #include <unistd.h>
45:
46: #include "chpass.h"
47:
48: /* ARGSUSED */
49: int
1.4 deraadt 50: p_login(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 51: {
52: if (!*p) {
53: warnx("empty login field");
54: return (1);
55: }
56: if (*p == '-') {
57: warnx("login names may not begin with a hyphen");
58: return (1);
59: }
1.7 millert 60: /* XXX - what about truncated names? */
1.9 deraadt 61: if (strcmp(pw->pw_name, p) != 0 && getpwnam(p) != NULL) {
1.7 millert 62: warnx("login %s already exists", p);
63: return (1);
64: }
1.1 deraadt 65: if (!(pw->pw_name = strdup(p))) {
66: warnx("can't save entry");
67: return (1);
68: }
69: if (strchr(p, '.'))
70: warnx("\'.\' is dangerous in a login name");
71: for (; *p; ++p)
1.13 ! deraadt 72: if (isupper((unsigned char)*p)) {
1.1 deraadt 73: warnx("upper-case letters are dangerous in a login name");
74: break;
75: }
76: return (0);
77: }
78:
79: /* ARGSUSED */
80: int
1.4 deraadt 81: p_passwd(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 82: {
83: if (!*p)
84: pw->pw_passwd = ""; /* "NOLOGIN"; */
85: else if (!(pw->pw_passwd = strdup(p))) {
86: warnx("can't save password entry");
87: return (1);
88: }
1.4 deraadt 89:
1.1 deraadt 90: return (0);
91: }
92:
93: /* ARGSUSED */
94: int
1.4 deraadt 95: p_uid(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 96: {
97: uid_t id;
1.7 millert 98: const char *errstr;
1.1 deraadt 99:
100: if (!*p) {
101: warnx("empty uid field");
102: return (1);
103: }
1.8 robert 104: id = (uid_t)strtonum(p, 0, UID_MAX, &errstr);
1.7 millert 105: if (errstr) {
106: warnx("uid is %s", errstr);
1.1 deraadt 107: return (1);
108: }
109: pw->pw_uid = id;
110: return (0);
111: }
112:
113: /* ARGSUSED */
114: int
1.4 deraadt 115: p_gid(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 116: {
117: struct group *gr;
1.7 millert 118: const char *errstr;
1.1 deraadt 119: gid_t id;
120:
121: if (!*p) {
122: warnx("empty gid field");
123: return (1);
124: }
1.13 ! deraadt 125: if (!isdigit((unsigned char)*p)) {
1.1 deraadt 126: if (!(gr = getgrnam(p))) {
127: warnx("unknown group %s", p);
128: return (1);
129: }
130: pw->pw_gid = gr->gr_gid;
131: return (0);
132: }
1.8 robert 133: id = (uid_t)strtonum(p, 0, GID_MAX, &errstr);
1.7 millert 134: if (errstr) {
135: warnx("gid is %s", errstr);
1.1 deraadt 136: return (1);
137: }
138: pw->pw_gid = id;
139: return (0);
140: }
141:
142: /* ARGSUSED */
143: int
1.4 deraadt 144: p_class(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 145: {
146: if (!*p)
147: pw->pw_class = "";
148: else if (!(pw->pw_class = strdup(p))) {
149: warnx("can't save entry");
150: return (1);
151: }
1.4 deraadt 152:
1.1 deraadt 153: return (0);
154: }
155:
156: /* ARGSUSED */
157: int
1.4 deraadt 158: p_change(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 159: {
160: if (!atot(p, &pw->pw_change))
161: return (0);
162: warnx("illegal date for change field");
163: return (1);
164: }
165:
166: /* ARGSUSED */
167: int
1.4 deraadt 168: p_expire(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 169: {
170: if (!atot(p, &pw->pw_expire))
171: return (0);
172: warnx("illegal date for expire field");
173: return (1);
174: }
175:
176: /* ARGSUSED */
177: int
1.4 deraadt 178: p_gecos(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 179: {
180: if (!*p)
181: ep->save = "";
182: else if (!(ep->save = strdup(p))) {
183: warnx("can't save entry");
184: return (1);
185: }
186: return (0);
187: }
188:
189: /* ARGSUSED */
190: int
1.4 deraadt 191: p_hdir(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 192: {
193: if (!*p) {
194: warnx("empty home directory field");
195: return (1);
196: }
197: if (!(pw->pw_dir = strdup(p))) {
198: warnx("can't save entry");
199: return (1);
200: }
201: return (0);
202: }
203:
204: /* ARGSUSED */
205: int
1.4 deraadt 206: p_shell(char *p, struct passwd *pw, ENTRY *ep)
1.1 deraadt 207: {
1.3 downsj 208: char *t;
1.1 deraadt 209:
210: if (!*p) {
211: pw->pw_shell = _PATH_BSHELL;
212: return (0);
213: }
214: /* only admin can change from or to "restricted" shells */
1.10 millert 215: if (uid && pw->pw_shell && !ok_shell(pw->pw_shell, NULL)) {
1.1 deraadt 216: warnx("%s: current shell non-standard", pw->pw_shell);
217: return (1);
218: }
1.10 millert 219: if (!ok_shell(p, &t)) {
1.1 deraadt 220: if (uid) {
221: warnx("%s: non-standard shell", p);
222: return (1);
1.11 jacekm 223: } else
224: t = strdup(p);
1.10 millert 225: }
226: if (!(pw->pw_shell = t)) {
1.1 deraadt 227: warnx("can't save entry");
228: return (1);
229: }
230: return (0);
231: }
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